Apparatus for rolling seamless hollow bodies



Nov. 21, 1933.v PQ HORBACH Er AL APARATUS FOR ROLLING SEAMLESSHOLLOW-BODIES Filed April 15, 1951 x f i rfl.

Patented Nov. 2l, '1933 UNITED STATES APPARATUS FOR ROLLING SEAMLESSHOL- LOW BODIES Peter Horbach, Dusseldorf -Eller,

Simoneit, Dusseldorf,

and Karl Germany, assignors to the lrm Vereinigte StahlwerkeAktiengesellschaft, Dusseldorf, Germany Application April 15, 1931,Serial No. 530,406, and in Germany April-28,1930

7 claims. (c1. zzo-13) In rolling mills which are used for theproduction of seamless hollow bodies of iron, steel or* other metaltubes the axes of both co-operating discs lie in the same plane. Bycorresponding o calibration of thev discs the pressing or rolling out ofthe blanks or work-pieces is effected, the longitudinal movement of thework-piece or blank when rolling, is effected in such a way that therolling takes place ata certain distance above or below the plane of therolling axes. The exact maintenance of this for a certain tubemeasurement is established by suitable guides rmly built in. Forconstructive reasons the usual operation of rolling is generallyeffected under the middle plane that is, the plane of the rolling axes.At a given rotation-direction of the rollers or discs, the direction ofthe longitudinal movement of the blank to be rolled with the rollingprocess, is reserved according to whether it is registered above orbelow the middle plane of the rollers. Hitherto if it were foundnecessary to move the blank or work piece back to the operating side,expensive devices for moving the blanks had to be employed whichrequired minute handling.

l According to the present invention however,

the disc rolling mill is itself employed for the return movement of theblank or work-piece in such a way that the said blank or work piece,after rolling or pressing has been effected in one direction, is carriedback parallel to the forward movement by the discs themselves, byregistering in an axis which lies opposite the middle p lane a secondguide being provided for guiding the blank or work-piece.

By the arrangement ofa second mandrel on Y the other side of the centralplane of the rolling mill, it is possible as a further development ofthe invention, not only to move the blank or work-piece in the oppositedirection but also to lroll it .in the reverse direction. 1t will beclearly understood that by this means blanks can either be pressed orrolled in both directions simultaneously or a blank can be rolled in onedirection and then be subjected to a further course of rolling orpressing on the return movement. Nothing stands in the way, in doing so,to work also simultaneously in both directions. Therefore it will beseen that according to the present invention, either a greater outputresults or a more completely rolled tube piece is obtained without thenecessity of subjecting the partially rolled tube to another machine forfur# ther rolling, that is to say, a thin tube can be producedimmediately on the present disc rolling mill from a complete blank orbillet and can then be conveyed to a finishing plant such as smoothrolling mills, mass rolling mills or reducing roller mills. The greateconomic advantages which are obtained by a disc rolling mill accordingto the present invention, are evident without further explanations. y

The additional devices consist in the arrange-- ment of a second mandrelon the hitherto free side of the rolling discs of the rolling mill withthe appertaining mandrel rod, the portable mandrel resistor, a guidebody provided with two guide openings betweenthe rollers, and a rotaryguide with two or more guide openings at a suitable distance from bothrolling axes on the one side or also on both sides of the rolling discsof therolling mill.

The accompanying drawing illustrates by way of. example, one particularconstruction of the present invention.

In the drawing Figure 1, shows a section through a rolling mill in whichthe blank or rolled blank is returned .without being subjected tofurther rolling.

Figure 2 is a section through a rolling mill for rolling in bothdirections.

Figures 3 to 3c show Various views and sections of the local Aguidebetween the rollers.

Figure 4; is a rotary guide with two guide passages.

Figure 5 a similar one with three guide passages.

In operation the blank or work piece coming from the furnace, heated torolling temperature is pushed in through the lower inlet guide. m intothe lower local guide i of the guide-body a, and rolled or pressedbetween the discs c and d and the mandrel b. The rolled-,out end of theblank or work-piece enters the guide passage p of the rotary guide g.After the rst rolling process the blank or work-piece is drawncompletely into the rotary guide by the returning mandrel. After theexit of the mandrel rod f out of the rotary guide body g the latter isrotated so that the rolled-out blank, now in the form of a shell lies infront of the upper local guide i1; the free guide-passage p1 has thenadjusted itself in front o f the lower local guide i. The Work-piecelying in front of the upper local guide 121, is pushed into it, andsubjected to a further rolling process between the discs c and d and themandrel h. The rolled out tube then passes, as described above, into theoutlet guide n. At the same time the lower mandrel-rod f is brought inagain with the freshly applied man- 110 drel head b between the rollers,so that a new blank or work-piece can be simultaneously pressed orrolled. After drawing back the mandrel rod k the outlet guide n isopened and the tube rolled out during the return movement, is ejected bylever mechanism and, as previously, conveyed to the further finishingprocess.

What we claim and desire to secure by Letters Patent is:

1. Apparatus for rolling seamless hollow bodies, comprising a pair ofrolling discs provided with inclined work engaging surfaces, between theoppositely disposedcooperating edges of which the tubes are rolled, twotube rolling mandrels associated with the rolling discs, local guidesfor directing the blanks on to the mandrels, inlet and outlet guides fordirecting the blanks to and from the local guides, the inlet and outletguides being arranged to form two sets of coaxial guiding passages forthe blanks, and those on one side of the discs being coupled together inparallel, and means provided for reversing the positions of the saidcoupled guides with reference to the local guides. y

2. Apparatus for rolling seamless hollow bodies, comprising a pair ofrolling discsprovided with inclined work-engaging surfaces between theoppositely disposed cooperating edges of which the tubes are rolled, twoparallel tube rolling mandrels associated with the rolling discsA tooperate in opposite directions, local guides for directing the blanksonto the mandrels, inlet and outlet guides for direct-ing the blanks toand from the local guides, a rotary-guide carrier, the carrier beingarranged to support two of the inlet and outlet guides in parallel andcoaxial with the respective mandrels and means for rotating the rotaryguide carrier to reverse the positions of the two inlet and outletguides.

3. Apparatus for rolling seamless hollow bodies, comprising a pair ofrolling discs which engage the blank between bevelled edges and set theblank in rotation during axial advancement, a guide body arrangedbetween the rolling discs and having two hollow and stationary guidesfoi guiding twov blanks simultaneously in different rolling planes anddirections and a rolling mandrel arranged in the longitudinal axis ofone of the guides.

4. Apparatus for rolling seamless hollow bodies, comprising a pair ofrolling discs which engage the blank between bevelled edges and set theblank in rotation during axial advancement, a guide body arrangedbetween the rolling discs and having two hollow and stationary guidesfor guiding two blanks simultaneously indifferent rolling planes anddirections and a rolling mandrel arranged in the longitudinal directionof one of the guides, and a guide body having longitudinal guides andadapted to receive the blank passing out of the rolling discs andadapted to rotate on its central longitudinal axis, the longitudinalguides of the said guide body being spaced from the central axis to thesame extent as the said guiding members. are arranged between therolling discs, so that one of the said longitudinal guides may receive ablank while the other is feeding another blank to the pass on the otherside of the rolls.

5. lApparatus for rolling seamless hollow bodies, comprising a pair ofrolling discs which engage the blank between bevelled edges and set theblank in rotation during axial advancement, a guide body arrangedbetween the rolling discs and having two hollow and stationary guidesfor guiding two blanks simultaneously in diierent rolling planes anddirections, and a rolling mandrel arranged in the longitudinal axis ofone of the guides, and a further rolling mandrel arranged in thelongitudinal axis of the other guide and acting in an oppositedirection.

6. Apparatus for rolling seamless hollow bodies, comprising a pair ofrolling discs which engage the blank between bevelled edges and set theblank in rotation duringy axial advancement,

a guide body arranged between the rolling discs and having two hollowand stationary guides for guiding two blanks simultaneously in differentrolling planes and directions and a rolling mandrel arranged in thelongitudinal axis of one of the guides, and a further rolling mandrelarranged in the longitudinal axis of the other guide and acting in anopposite direction, and a guide body having longitudinal guides andadapted to receive the blank passing out of the rolling discs andadapted to rotate on its central longitudinal axis, the longitudinalguides of said guide body being spaced from the central axis to the sameextent as the said rolling mandrels, so that one of the saidlongitudinal guides may receive a blank while the other is feedinganother blank to the pass on the other side of the rolls.

7. Apparatus for rolling seamless hollow bodies, comprising a pair ofrolling discs which engage the blank between bevelled edges and set theblank in rotation during axial advancement,

a guide body arranged between the rolling discs and having two hollowand stationary guides for guiding two blanks simultaneously in dierentrolling planes and directions and a piercing mandrel arranged in thelongitudinal axis of.one of the guides, and a rolling mandrel arrangedin the longitudinal axis of the other guide and acting in the oppositedirection, and a guide body having longitudinal guides and adapted toreceive the blank passing out of the rolling discs and adapted to rotateon its central longitudinal axis,-the longitudinal guides of said guidebody being spaced from the central axis to the same extent as the saidrolling mandrels, so that on`e of the said longitudinal guides mayreceive-a blank while the other is feeding another blank to the pass onthe other side of the rolls.

PETER HORBACH. KARL SIMONEIT.

